Head Styles
The washer head (SML) screw is our most
popular head style as it provides the largest
amount of surface area to seat firmly in the
bottom of the pocket. Available in both fine
or coarse thread, this head style is highly
recommended if the material the pocket is
drilled into is soft such as plywood or pine.
The large washer head assures that the
screw is not overdriven in the bottom of
the pocket.
Screw Length
There are four thread lengths most commonly used in pocket hole joinery;
1", 1-1/4", 1-1/2" and 2-1/2". Choosing the correct screw length
depends on the setting of your jig and the depth at which you drill the pocket
hole. Many times you will be joining 3/4" material to 3/4" material, 1/2" material
to 1/2" or 1-1/2" material to 1-1/2" material. The chart below helps you select
the screw to use in these situations.
The second available head style is the pan head (SPS). The pan head is slightly
smaller in both head and shank diameter than the washer head screw and is a
good alternative to the washer head screw if both mating workpieces are made
of extremely hard woods. The pan head style is also of benefit in the 1" length as
it allows one to join 1/2" stock and easily seat the screw head below flush.
Hardwoods
(Oak, Maple,
Walnut, etc.)
Softwoods,
(playwood,
MDF, pine,
etc.)
Material Thicknesses Being Joined
1/2” to 1/2” 3/4” to 3/4” 1-1/2” to 1-1/2”
*SPS-F1
SPS-F1(W)
*SPS-C1
SML-C1
*SML-F125
SML-F125(W)
SML-F150
SPS-F125
SPS-F125(W)
SPS-F150
*SML-C125
SML-HL125
SML-C125(W)
SML-C150
SML-C150(W)
*SML-C250(W)
SML-C250
*SML-C250(W)
SML-C250
SML-F125
SML = WASHER HD.
SPS = PAN HD.
1 = 1”
125 = 1-1/4”
150 = 1-1/2”
250 = 2-1/2”
F = FINE
C = COARSE
HL = HI- LO
KEY
* - denotes
preferred
screw type
(W) - denotes
weather
resistant
coating
Figure
(23)
Figure
(24)
1616
1616
16
To Next Page
Loading...